Air-resistance reducing golf club head

ABSTRACT

A golf driver club head with air holes, for increasing the speed of the driver and the accuracy of the flying direction of the ball, is provided. The front face of the driver club head is flat. Two shallow vertical arc shape holes are developed on the left side and another two shallow vertical arc shape holes are developed on the right side of the front face of the club head. One circular hole is developed at the center of the rear face of the club head. Air comes through the four vertical arc shape holes and passes through the empty inner space of the club head and goes out through the circular hole.

FIELD OF THE INVENTION

Current application is related with a golf driver club head, especially a club head with a flat front face and air holes.

BACKGROUND OF THE INVENTION

The size of golf club driver head is becoming larger and larger theses days to increase the size of ‘sweet spot’, on which the head of the club and a golf ball contact in best condition. In addition to this, the larger (the heavier) the club head, the longer the golf ball, impacted by the driver, flies.

When an amateur golf player does T-off, the average velocity of the club head reaches about 40 meter per second. It is 144 km/hr (90 miles/hr). This speed can be easily increased by reducing air-resistance. But, the big size golf club driver head only increases the air-resistance. Even a slight unbalance of air stream surrounding the club driver head at this speed can shake swing trajectory of the club driver. Then the contact angle between the front face of the club driver and a golf ball easily changed from a right angle. The slightly outwardly rounded structure of the front face of conventional golf club driver head makes it worse as shown in FIG. 1. It is the purpose of the current application to provide a golf club driver head that is designed to minimize such limitations caused by structure of previous golf club driver heads, which are large and have hunched front face.

DESCRIPTION OF THE PRIOR ART

U.S. Pat. No. 5,464,211 to Atkins, Sr. illustrates a hollow golf club head for a “metal wood” wherein an internally mounted backing plate gives strength and stability to the striking face of the club. Additionally, in the preferred embodiments, an internal apparatus is present whereby the backing plate is compressively loaded to more rigidly support the striking face of the club, thereby to make it more unyielding upon impact with a golf ball. There is no hole developed throughout the head from the face to the rear part.

U.S. Pat. No. 4,944,515 to Shearer illustrates a cast metal hollow headed golf club head having there within at least one internal structural support member disposed between the rear of the club head and the face of the club head, a first end of the internal structural support member being positioned at the geometric center of the face of the club head and a second end of the structural support member opening through the rear surface of the hollow headed golf club and having an open bottom thereto which a bottom plate is permanently secured after the internal cavity of the hollow headed golf club is filled with a sound-proofing material, the internal structural member adapted to house additional metal or similar material to predetermine the resulting weight of the golf club head. However, there is no supporting structure having a hole developed throughout the club head.

U.S. Pat. No. 4,535,990 to Yamada illustrates a golf club head that is hollowed out to provide desired lightweight characteristics. A tubular reinforcement material formed of plastic including reinforcement fibers, separate from the club head itself, is inserted into the cavity attached at the inner walls of the face and back, so as to span between them to prevent deformation of the head face and to hold the stiffness and mechanical strength required at its impact face. But, both of the ends of the tubular reinforcement are blocked.

U.S. Pat. No. 4,461,481 to Kim illustrates a driver type of golf club, which includes a hollow metal head having integrally formed thereon a front striking face and a rear wall with interior flat portions, and a removable sole plate. A rod having a back plate integrally formed on the rear thereof has a cylindrical weight slidably mounted thereon.

U.S. Pat. No. 4,067,572 to Coleman illustrates a golf club having a shaft and a club head, the club head comprising a stationary, main body portion, and a face portion which is movable with respect to the stationary portion to vary the angular disposition of the face portion with respect to the stationary portion and the shaft of the club.

None of the prior art teaches a club head having shallow vertical arc shape holes developed on a flat front face and a circular hole on the rear face to allow air pass through the club head to stabilize the trajectory of the club head.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a golf club driver head that can increase the speed of the driver head at the impact moment of T-OFF and increase stability of the driver head's swing trajectory. When an amateur golf player swings a driver for T-off, the speed of a driver club head reaches well over 40˜50 meter/second. This speed is over 150 km/hr. At this speed, the resistance of air to the club head is significant. Even a slight unbalance of the drag force shakes the trajectory of the club head and moves the hitting point of the golf club from the center of the club head. The golf club driver head of the current application has a flat front face. Two shallow vertical arc shape holes are developed on the left side and another two shallow vertical arc shape holes are developed on the right side of the front face of the club head. One circular hole is developed at the center of the rear face of the club head. The holes developed on the club head allow the air resisting the club head pass through to increase the speed of the club head. And the air stream penetrate the club head stabilizes the trajectory of the club head's swing. This stabilized swing trajectory increases the possibility of a golf ball hit by the driver head at the right point with right angle and the possibility of the ball stay on the green of the golf course. The novel structure of the golf club head of the current application enables an increase of the velocity of the club head and increase of the stability of the trajectory of the club head to increase the accuracy of the impact, especially at T-off moment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic over view of a golf ball hit by a golf club driver head of prior art at an impact moment.

FIG. 2 is a schematic over view of a golf ball hit by a golf club driver head of the current application at an impact moment.

FIG. 3 is a front view of the golf club driver head of the current application.

FIG. 4 is a rear view of the club head of the current application.

FIG. 5 is an cross sectional over view of the club head of the current application shown along the line A-A′ in FIG. 3.

FIG. 6 is a cross sectional side view of the club head along the line B-B′ in FIG. 5.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 is a schematic over view of a golf ball (1) hit by a golf club driver head (2) of prior art at an impact moment. The front face (3) of most of conventional club driver head (2) is slightly rounded outward. Therefore, if the golf ball (1) is not hit by the driver head (2) at right point with right angle, the golf ball (1′) will bounce to a wrong direction due to the curvature of the front face (3). If the trajectory (4) of the club driver head (2) is unstable and oscillates side way (4-1), the bounced golf ball (1′)'s flying direction is totally unpredictable.

FIG. 2 is a schematic over view of a golf ball (1) hit by a golf club driver head (5) of the current application at an impact moment. The front face (6) of the driver head (5) of the current application is flat. Therefore, the direction of the bounced golf ball (1) does not changed quite different from that of the golf ball (1) which was hit by the right position of the driver head (5) of the current application even though the trajectory (4) of the driver head (5) oscillates side way (4-1).

FIG. 3 is a front view of the golf club driver head (5) of the current application. FIG. 4 is a rear view of the club head (5) of the current application. In addition to the above strong points, four shallow vertical arc shape holes (7) are developed on the front face (6) of the driver head (5) to stabilize the trajectory (4) of the driver head (5) and a circular hole (8) is developed at the center of the rear face (9) to reduce the air-resistance for increasing the impact speed of the driver head (5). Two shallow vertical arc shape holes (7-L) are developed on the left side and another two shallow vertical arc shape holes (7-R) are developed on the right side of the front face of the club head.

FIG. 5 is an cross sectional over view of the club head of the current application along the line A-A′ in FIG. 3 showing the detail shape of the four shallow vertical arc shape holes (7) developed on the front face (6) of the driver head (5). The four holes (7) are developed by press-puncturing the flat front face (6). Then the pressed-in portion of the front face becomes the wings (10) of the holes (7). The wings (10) are angled to the front face to guide the air (11) on the way of the trajectory, pass through the empty space (12) in the club head (5) and comes out throughout the hole (8) on the rear face (9) of the club head (5).

FIG. 6 is a cross sectional side view of the club head along the line B-B′ in FIG. 5 showing the side shape of the wing (10).

The novel structure of the club head (5) of the current application renders increased impact speed and increased trajectory stability to a golf club driver head. 

1. A golf club driver head, which has four shallow vertical arc shape holes, two of them are developed on the left side and the other two are developed on the right side of the front face of the driver head, and a circular hole that is developed at the center of the rear face of the driver head to reduce the air-resistance for increasing the impact speed of the driver head and for stabilizing of the trajectory of the driver head. 